- Designation: Official Statistics
- Survey name: Low Carbon and Renewable Energy Economy (LCREE) Survey
- Data collection: Sample 25,000 businesses
- Frequency: Annual
- How compiled: Sample-based survey
- Geographic coverage: UK
- Related publications: Low carbon and renewable energy economy, UK
- Last revised: 16 February 2023
This quality and methodology report contains information on the quality characteristics of the data (including the European Statistical System five dimensions of quality (PDF, 3.0MB) as well as the methods used to create them.
The information in this report will help you to:
- understand the strengths and limitations of the data
- learn about the existing uses and users of the data
- understand the methods used to create the data
- help you to decide suitable uses for the data
- reduce the risk of misusing data
The Low Carbon and Renewable Energy Economy (LCREE) Survey is the primary source of official information on LCREE activity in the UK.
Businesses are considered to be active in the LCREE if they provide information on economic performance within 17 predefined LCREE sectors (.doc, 25.4KB).
Estimates are available at the UK and country level for turnover, number of businesses, imports, exports, employees (in full-time equivalents) and capital investment.
Estimates of the accuracy associated with the dataset is provided for total estimates of the LCREE as well as at various levels of granularity; increasing the granularity to, for example, country or LCREE sector, can present further accuracy challenges, which can limit the use of the data.
The survey only collects data on direct LCREE activity and not indirect activity (that is, the additional activity in the economy generated because of demand for the products of LCREE-active firms, the wages they pay to employees, or the increase in demand for the inputs used by businesses directly active in the LCREE).
LCREE activity does not have to be the main activity of a business for it to be counted as active in the LCREE.
The Low Carbon and Renewable Energy Economy (LCREE) Survey was designed to provide estimates of the LCREE in the UK, following demand for official statistics on this topic. The survey was conducted for the first time in 2015, for the reporting year 2014.
LCREE Survey results can be used to provide estimates of activity in 17 LCREE sectors as outlined in the LCREE sector and codes and descriptions (.doc, 25.4KB). Estimates of turnover, employment, number of businesses, imports, exports and capital assets are available at the UK and country level.
The LCREE Survey currently samples approximately 25,000 UK businesses using the Inter-Departmental Business Register (IDBR) as the sampling frame. The design is a stratified single-stage simple random sample with the target population being stratified by industry, employment size and UK country. Sample selection occurs independently within each stratum.
Sample respondents are weighted to represent the number of non-sampled businesses within the same stratum. As many nil returns are received, estimates are calculated using a two-stage process in combination with one-sided Winsorisation (an averaging method that limits extreme values), to improve the quality of results. Standard errors are calculated assuming that the estimator of the population total is a product of independent random variables. This calculation considers both the variability in the estimate of the proportion of non-zero LCREE activity and the variability of the estimate of the population total assuming all non-zero response.
Results with associated measures of their accuracy are published approximately 12 months after the reference period. The data published are estimates for the calendar year, January to December.
Examples of uses and users
The Department for Energy Security and Net Zero (DESNZ) uses estimates from the LCREE Survey as an informative framework for the development of cross-cutting and sector-level policies across the clean growth and climate change areas.
LCREE Survey estimates are published in the biennial Energy in Northern Ireland compendium publication; the data are used in briefings to policy colleagues regarding the size of the low carbon economy in Northern Ireland and will be used in any review of the Northern Ireland Strategic Energy Framework.
The Welsh Government tracks and uses LCREE Survey estimates internally to monitor progress, while publishing LCREE estimates in carbon budget delivery plans such as the Low carbon delivery plan, in addition to other publications such as the Just Transition consultation and the energy efficiency strategy.
Several other government departments regularly use LCREE data for general briefing to ministers and to inform responses to Parliamentary Questions that are received regarding the size of the low carbon economy.
Estimates from the LCREE Survey may be used to contribute to international monitoring and regulation; for example, they are used to help fulfil regulatory required statistics such as estimates of the Environmental Goods and Services Sector produced under the UN System of Environmental Economic Accounting (UN SEEA) framework and to contribute to Sustainable Development Goal (SDG) indicators such as Indicator 7.b.1: Investment in Energy Efficiency as a proportion of Gross Domestic Product (GDP).
Estimates from the LCREE Survey are used in combination with national accounts information to help provide an indication of the indirect economic impacts of activity in the LCREE (see Indirect activity in the LCREE).
The Office for National Statistics (ONS) is currently leading a piece of work aimed at defining and measuring green jobs in the UK and published a response summary (PDF, 342KB) to our user engagement exercise in November 2022. It is anticipated that results from the LCREE Survey will be a key contributor to any statistics produced by the ONS in this field and that this work should help guide future LCREE development goals.
Estimates from the LCREE Survey are currently used by international organisations, UK and devolved governments, and the wider research community. They can be used to help assess and develop policies in areas such as green job creation, investment in the LCREE or the trade of LCREE products.
Strengths and limitations
The main strengths of the LCREE Survey include:
a high response rate – before 2019, the LCREE response rate has consistently been above 80% at the publication of results, while the response rate fell to around 65% for 2019, 2020 and 2021 data, this is still higher than most business surveys
the LCREE questionnaire collects activity by sector, which allows users to gain a thorough insight into the type of activities operating in the LCREE within the UK
The main limitations of the LCREE Survey include:
the final and only estimates are published just over 12 months after the period to which the data relate, because of the size and complexity of the survey
the accuracy of survey-based estimates for smaller LCREE sectors and country-level disaggregations, which is highlighted by 95% confidence intervals and coefficients of variation (CV) published with the LCREE estimates, can be variable, which limits the use of some of the data; sample optimisation as the survey continues each year should improve the ability to target LCREE businesses, and accuracy of estimates for smaller sectors
LCREE government user group meetings are held quarterly to give an opportunity for any changes or developments to the LCREE Survey to be discussed directly with the survey’s main users to ensure the survey continues to meet policy requirements. The survey’s main users include:
- Department for Energy Security and Net Zero
- Welsh Government
- Northern Ireland Department for the Economy
- Scottish Government
- Climate Change Committee
From the 2018 reporting period onwards, following user request, associated 95% confidence intervals of all survey-based estimates will be provided to aid user interpretation of the accuracy of LCREE estimates.Back to table of contents
This report provides a range of information that describes the quality of the output and details any points that should be noted when using the output.
We have developed guidelines for defining quality; these are based upon the five European Statistical System (ESS) quality dimensions. This report addresses these quality dimensions and other important quality characteristics, which are:
timeliness and punctuality
coherence and comparability
accuracy and reliability
accessibility and clarity
More information is provided about these quality dimensions in the following sections.
Relevance is the degree to which the statistical product meets user needs for both coverage and content.
The Low Carbon and Renewable Energy Economy (LCREE) Survey has been developed in consultation with stakeholders from government departments, who are the primary users of the data, following demand for LCREE official statistics.
A stakeholder group was set up that includes representatives from the Department for Energy Security and Net Zero, Welsh Government, Scottish Government and Northern Ireland Department for the Economy. Workshops were organised during the start-up phase of the survey to ensure the questionnaire and sample selection met requirements. This included developing a list of 17 LCREE sectors for which statistics on activity were required as outlined in our LCREE Survey Guidance.
Stakeholders are consulted before any questionnaire changes are made.
The LCREE Survey is the primary source of official information on LCREE activity and has been designed to meet the needs of users. For example, devolved administrations required regional information, at the UK country level, on LCREE activity. Many businesses may have their reporting office in a different location to where the LCREE activity takes place. The LCREE Survey asks respondents to apportion their LCREE activity between UK regions to overcome this problem and produce robust regional statistics.
Timeliness and punctuality
Timeliness refers to the lapse of time between publication and the period to which the data refer. Punctuality refers to the time lag between the actual and planned dates of publication.
For LCREE, a statistical bulletin is published annually around 12 months after the period to which the data refer and includes all headline estimates of UK and country-level turnover, employment, number of businesses, imports, exports, acquisitions and disposals and, in addition, group, sector and industry breakdowns of these estimates.
All publications are pre-announced on the Office for National Statistics (ONS) release calendar at least four weeks in advance. If there are any changes to the pre-announced release schedule, public attention will be drawn to the change and the reasons for the change will be explained fully at the same time, as set out in the Code of Practice for Statistics.
The time lag between despatch and collection of the LCREE questionnaire and publication of the subsequent estimates reflects the size and complexity of this survey. Detailed breakdowns between LCREE sectors and geography require detailed responses from a large number of businesses.
Coherence and comparability
Coherence is the degree to which data that are derived from different sources or methods, but refer to the same topic, are similar. Comparability is the degree to which data can be compared over time and domain, for example, geographic level.
Limited comparator data are available. Information is available on some individual LCREE sectors. However, differences in scope limit comparability. Some examples follow.
Department for Energy Security and Net Zero (DESNZ) publish statistics on all renewable energy sources in the UK in the Digest of United Kingdom Energy Statistics (DUKES): Chapter 6, Renewable Sources. These statistics cover the production of electricity and renewable electricity capacity. Statistics produced from the LCREE Survey cover all economic sector activity, including design, installation and maintenance in addition to the production of electricity.
Data on activity in the UK low carbon economy between 2010 and 2013 are available from the Low Carbon Report. The differences in definitions and methodology mean that the results are not directly comparable with the LCREE Survey. One significant difference is that this report used a combination of a small survey and existing data. Another important difference is that the study included the supply chain; hence the headline figures quoted by the report are far higher.
The LCREE Survey was conducted for the first time in 2015 collecting data for the calendar year 2014. This was the first survey of this kind following demand for official LCREE statistics. Continuity between the now eight years of the survey has been ensured with minimal changes made to the questionnaire. Any changes made have provided further information to respondents to minimise the risk of error, following feedback from respondents. Year-on-year comparisons are now available up to and including estimates from the calendar year 2014.
The method used to calculate business counts for sectors within the LCREE was changed since the publication of 2014 final estimates in May 2016. Previously, businesses were apportioned to each sector that they were active in. For example, if a business was active in three sectors, then it counted as one-third of a business in each sector. The benefit of this was that the sum of businesses in each sector added up to the UK total number of businesses. However, this potentially resulted in an underestimate of the number of businesses active within a particular sector.
Our new methodology, used since the release of 2015 estimates in April 2017, means that if a business is active in three sectors it counts as one business within each sector. This means that when the number of businesses is summed across all the sectors the total may be more than the UK total number of businesses. This methodology has now been applied to all years and the method used to calculate the UK total number of businesses within the LCREE is unchanged since the survey began.
The survey sample size was reduced from around 40,000 in 2014 to around 14,000 in 2015. To enhance the sample for 2015, a number of businesses that were known to have activity in the LCREE were selected to be included in the sample. Because these businesses were not selected through random sampling for the 2015 sample, the weight applied to them to estimate for non-response is lower than it was in 2014. This partially explains why the estimates for the LCREE are generally lower in 2015 compared with 2014.
Comparing estimates from 2014 with estimates from later years of the survey is not advised because of changes in the sample methodology that were implemented in 2015.
Accessibility and clarity
Accessibility is the ease with which users are able to access the data, also reflecting the format in which the data are available and the availability of supporting information. Clarity refers to the quality and sufficiency of the release details, illustrations and accompanying advice.
The Low Carbon and Renewable Energy Economy (LCREE) microdata are made available via the Secure Research Service (SRS). This provides the opportunity for approved researchers to access to this detailed information in a controlled environment.
Our recommended format for accessible content is a combination of HTML web pages for narrative, charts, and graphs, with data being provided in usable formats such as CSV and Excel. Our website also offers users the option to download the narrative in PDF format. In some instances, other software may be used, or may be available on request. Available formats for content published online but not produced by us, or referenced on our website but stored elsewhere, may vary. For further information please refer to the contact details at the beginning of this report.
Why you can trust our data
The Office for National Statistics (ONS) is the UK’s largest producer of statistics and is its national statistics institute. The Data Policies and Data Principles details how the data are collected, secured and used in the publication of statistics. We treat the data we hold with respect, keeping them secure and confidential, and we use statistical methods that are professional, ethical and transparent.Back to table of contents
How we collect the data, main data sources and accuracy
When the Low Carbon and Renewable Energy Economy (LCREE) Survey was first designed, instead of sending questionnaires to all industry sectors in the economy, a target population of industries likely to have LCREE activity was developed based on four sources. Evidence from the Annual Business Survey, guidance from Eurostat, the target population of similar surveys administered by other national statistical institutes (NSIs) and the Office for National Statistics (ONS) expert judgement. UK government stakeholders were consulted and the proposed target population of 72 two-digit Standard Industrial Classifications (SICs) was agreed upon.
Table 1 shows the industries (divisions) initially excluded from the LCREE sample.
|Information service industries||63|
|Financial and insurance activities||64, 65, 66|
|Public administration and defence; compulsory social security||84|
|Human health and social care activities||86, 87, 88|
|Arts, entertainment and recreation||90, 91, 92, 93|
|Repair of computers and personal and household goods||95|
|Activities of households as employers; undifferentiated goods - and services - producing activities of households for own use||97, 98|
|Activities of extraterritorial organisations and bodies||99|
Download this table Table 1: 16 industries initially excluded from sample selection.xls .csv
Following a review of the data collected in the first two years of the survey, 27 industry divisions (see Table 2) were identified as not within the target population of interest and were excluded from the sample frame for the 2016 reporting period onwards. Revisions were made to previously published 2014 and 2015 estimates to account for this change.
|Extraction of oil/gas||06|
|Mining support services||09|
|Manufacture of food||10|
|Manufacture of beverages||11|
|Manufacture of textiles||13|
|Manufacture of clothes||14|
|Manufacture of leather||15|
|Manufacture of wood products||16|
|Printing/reproduction of media||18|
|Manufacture of coke/refined products||19|
|Manufacture of pharmaceuticals||21|
|Manufacture of furniture||31|
|Repair/installations of machinery||33|
|Food and beverage services||56|
|Motion picture/tv etc||59|
|Travel agents/tours etc||79|
Download this table Table 2: 27 divisions excluded from 2016 reporting period and future selections.xls .csv
Concepts and definitions
Concepts and definitions describe the legislation governing the output, and a description of the classifications used in the output.
The LCREE Survey asks respondents to report their activity in 17 LCREE sectors as reported later in this section. These sectors were developed in consultation with LCREE experts from various government departments, who are also data users.
Experts were further consulted regarding aggregating these sectors into groups of similar activity. These six groups are reported later in this section.
Standard Industrial Classification
Estimates are presented at an industry level using the Standard Industrial Classification: SIC 2007. This is the UK standard industrial classification of economic activities.
The LCREE Survey was designed to provide greater detail on the low carbon and renewable energy economy in the UK.
The survey questionnaire was designed using our standard four-stage process:
- specialist review
- feasibility testing
- cognitive testing
- final reporting
See our survey guide for respondents for more detail.
Data collection takes place online, with a very small number of businesses being sent a paper version. Respondents are asked if the business operates in any of the 17 LCREE sectors listed in this section.
Respondents are then asked to report the turnover, imports, exports, employment, and capital assets for any of the LCREE sectors they have operated in during the reference period. Where businesses are active in multiple LCREE sectors, respondents are asked to report the information separately for each sector.
LCREE sectors and descriptions of activity
Offshore wind, onshore wind, solar, and hydropower
The production of electricity and the design, production, and installation of infrastructure for this purpose, including operations and maintenance.
Other renewable electricity
The production of electricity from wave and/or tidal and/or geothermal renewable sources and the design, production, and installation of infrastructure for this purpose, including operations and maintenance.
The production of energy (electricity and heat) and the design, production, and installation of infrastructure for this purpose, including operations and maintenance.
Bioenergy is liquid biofuels, solid biomass and biogas, for example, bio methane, vegetable oil, peanut oil and energy crops. This sector includes gasification and anaerobic digestion.
The production of fuels for low carbon and renewable energy use, which is not classified as bioenergy. Including hydrogen. Excluding compressed natural gas and liquefied petroleum gas.
The design, production, and installation of infrastructure for generating heat directly through solar, thermal, geothermal or other means. Including operations and maintenance. Including ground source and air source heat pumps. Excluding generating electricity, which is then used to generate heat. Excluding heat from biomass, which is classified under bioenergy.
Renewable combined heat and power
The design, production and installation of infrastructure for generating heat directly through solar, thermal, geothermal or other means where the renewable sources both generate direct heat and electricity. Including operations and maintenance. Excluding heat and power from biomass, which is classified under bioenergy.
Energy efficient lighting
The design, manufacture and installation of energy efficient bulbs, tubes, fittings and so on, designed to use less energy to produce the same or greater amount of light.
Energy efficient products
The design, manufacture and installation of energy efficient products. Examples include:
energy efficient doors and windows
heating and ventilation, such as condensing boilers, ventilation and heating recovery
insulation such as loft, external wall, roof insulation, reducing energy consumption for heat or air conditioning by minimising “leakage” of heat
energy efficient building materials or technologies
sustainable buildings and architecture
materials with greater insulation properties or durability properties or those requiring significantly less carbon emission in their manufacture or recycling waste materials in their manufacture
Excludes “smart” goods such as TVs and freezers.
Energy monitoring, saving or control systems
The design, manufacture and installation of systems that reduce energy consumption through effective heat or energy management. Include equipment and related systems for doing this.
smart heating controls
control system components
energy management systems
energy management software
Low carbon consultancy, advisory and offsetting services
Expert advice and education on reducing carbon consumption, engaging in low carbon industrial activities, carbon credits and funding systems for low carbon activities and services.
Includes environmental and/or energy consultants.
Low emission vehicles and infrastructure
Design and manufacture of vehicles with specific technology to significantly reduce or remove emissions. Includes hybrid vehicles, electric vehicles, fuel cell vehicles or other technologies. Include installation of infrastructure to support these vehicles.
Excludes small efficiency improvements such as lighter bodywork or aerodynamics. Fuel-efficient, conventional vehicles are also excluded.
Carbon capture and storage
Capturing waste CO2 at point of emission and depositing it where it will not enter the atmosphere. Activity of doing this and the design, manufacture and installation of infrastructure for this purpose.
The production of electricity from nuclear power and the design, production and installation of infrastructure for this purpose. Including operations and maintenance. Decommissioning and waste processing activities are excluded.
Fuel cells and energy storage systems
The design, manufacture and installation of energy storage systems, flywheel energy storage, fuel cells, batteries and any other form of energy storage system.
These 17 LCREE sectors are also aggregated into groups for results publication. Estimates at sector level that are considered disclosive are suppressed (see section on “Disclosure control” for more details).
LCREE groups and description of activity
Low carbon electricity
- Offshore wind
- Onshore wind
- Other renewable electricity
- Nuclear power
- Carbon capture and storage
Low carbon heat
- Renewable heat
- Renewable combined heat and power
Energy from waste and biomass
- Alternative fuels
Energy efficient products
- Energy efficient products
- Energy efficient lighting
- Energy monitoring, saving or control systems
Low carbon services
- Low carbon consultancy, advisory and offsetting services
Low emission vehicles and infrastructure
- Low emission vehicles and infrastructure
- Fuel cells and energy storage systems
The LCREE Survey samples approximately 25,000 UK businesses using the Inter-Departmental Business Register (IDBR) as the sampling frame. Sample selection is carried out using a stratified single-stage simple random sample with a target population stratified by different cells. Groups of businesses (called cells) are defined by three criteria:
- employment size-band
- industry (Standard Industrial Classification: SIC 2007)
- UK country of business registration (as per the IDBR)
There are around 900 of these cells in LCREE design. Sample selection occurs independently for each cell.
All businesses with 250 or more employees are selected, together with a random sample of businesses from each of the other strata, defined by two-digit SIC 2007 industry, country, and employment size-band. Businesses that are randomly sampled are generally expected to remain in the sample for two years. The sample is supplemented with a small number of businesses that are known to be highly active in one or more of the LCREE sectors, but do not have large enough employment to be selected as part of the census strata. These businesses are allocated to a reference list and will remain on the list each year as their returns are “unique”, and therefore need to be added to their own cell.
The total sample is allocated between strata to try and minimise the variance of the estimates of total LCREE turnover at the UK, country and LCREE group-level as far as is possible.
The sample will be re-optimised to improve the efficiency of sample estimation as more data from the survey become available.
How we process the data
Editing and validation
All responses are put through validation checks and any issues are investigated and queried with the respondent to obtain explanations for data anomalies. Sources such as the Inter-Departmental Business Register (IDBR) and business websites are also used to investigate data.
Various quality assurance exercises, such as validating nil returns, are also carried out. As a large number of nil returns are received (roughly 80% of the returns), a range of methods are employed to identify businesses for which activity is expected. These include:
- cross-checks against lists of businesses known to be transacting in the low carbon industries
- searches for specific key words within the name such as “solar”, “wind” and “energy”
- sector specific checks – for example, businesses in SIC 43.2 “Electrical, plumbing and other construction installation activities”
- within the construction industries businesses are contacted to establish if they carry out installation activities for energy efficient products
Imputation techniques are used to estimate the value of the missing data caused by non-response.
Non-response can lead to a reduction in the precision of estimates and undermine the data's utility for users. For the LCREE Survey there are two types of imputation processes:
- item non-response imputation, which refers to incomplete responses
- unit non-response imputation, which refers to businesses that did not respond to the survey
Imputation methods for item non-response are based fundamentally on other survey variables that serve to predict the values or distribution of plausible values of the target variable(s) being imputed (the imputation classifications). Typically, the imputation classifications will consist of other variables from the survey that have two fundamental properties. They should:
- account for any non-response bias identified in the data
- be good predictors of the target variable(s)
Poorly specified classifications will lead to error or bias in survey estimates.
Businesses that have provided valid responses are divided into imputation classes and the median value for the class is calculated. Item non-response replaces missing items with the median of the values returned by the other responders in the imputation class. All incomplete responses are treated for item non-response. It is important that the imputation class has enough responders to enable the imputation calculations to give a fair result. Otherwise, one very large or small response could have a large impact on the quality of the imputed values. An imputation class has to hold at least 10 responders providing complete response. Where this is not the case the next priority order imputation class would be applied.
Imputation classification order:
- SIC 2007 section and LCREE Sector
- SIC 2007 section and LCREE Group
- Collapsed SIC 2007 section (industries A, D, F, G and M separated out and all other sections combined) and LCREE Group
- LCREE Group only
When the survey was initially set up, it was not possible to impute for unit non-response as there were no previous data and so all missing whole returns were dealt with by using the mean of the responders (mean imputation). Now previous survey data are available, unit non-response imputation for larger businesses (250 or more employees) and reference list businesses imputes the non-responders in that group with their previous data, upscaled with a growth factor. This growth factor is calculated from responders in both the current and previous years, as the ratio of their current total divided by their previous total (ratio of means imputation). This method is applied to all variables except disposals. For disposals there is very little year-on-year correlation so applying a growth factor is not sensible. Non-response for this variable is accounted for by using mean imputation.
The rest of the sample non-responders, that is, businesses with fewer than 250 employees or not on the reference list, are accounted for by using mean imputation.
Weighting and estimation
Sample respondents are weighted to represent a number of non-sampled businesses within the same stratum. As many nil returns are received, estimates are calculated using a two-stage process, to improve the quality of results.
First, the proportion of businesses reporting any LCREE activity within a stratum is estimated. Second, a weighted aggregate of LCREE activity is calculated from those businesses reporting activity. This is achieved by removing those businesses that report no LCREE activity and adjusting the weights of the remaining businesses to ensure they represent the non-sampled businesses appropriately. The resulting weighted responses are then aggregated. The final stage of the process is to multiply the estimate of the proportion by the weighted aggregate to estimate the population total in each stratum.
All businesses in the census strata (250 or more employees), and those from the reference list, should have a weight of one as they represent themselves. However, not all of businesses respond, and if they have never responded to the LCREE Survey, the weights for the rest of the census strata are adjusted to compensate for this. If a business has previously responded to the LCREE Survey, but has not responded to the latest questionnaire, they are dealt with instead by imputation.
In the first year of the survey (reporting period 2014), no reference list existed as LCREE activity was unknown. A reference list was introduced for the 2015 survey period. Businesses that had identified LCREE activity in 2014 were then added to the reference list in 2015, this will have resulted in a reduction in their weighting.
Business counts are estimated as the weighted aggregate of the proportion of activity reported in each sector and region for each business. These count estimates are consistent across groups, regions and the whole economy.
Businesses with extreme or atypical main variable returns are automatically detected and treated using a method known as one-sided Winsorisation. The detection threshold is set to minimise the mean squared error, with those businesses identified as outliers having their values reduced towards the threshold so they do not represent as many unsampled businesses as their initial weight would imply. The parameters used to set the detection threshold are reviewed on a regular basis. It is the treated values that are used in the estimator.
In addition, some returns have values that are atypical when compared with similar businesses, and also have a large impact on estimated totals, are treated as outliers with post-stratification. They are removed from their original cells and assigned to unique new ones, reducing their weights to one, so that they do not have a large distorting effect on the estimates. The weights of other businesses in the original cell as the outlier are then recalculated.
Standard errors are calculated assuming that the estimator of the population total is a product of independent random variables and considers both the variability in the estimate of the proportion of non-zero LCREE activity, and the variability of the estimate of the population total assuming all non-zero response.
The Code of Practice for Statistics guarantees confidentiality to those who provide private information to produce Official Statistics. Principle T6.4 of the Code states: “Personal information should be kept safe and secure, applying relevant security standards and keeping pace with changing circumstances such as advances in technology.”
Furthermore, our surveys are conducted on behalf of the UK Statistics Authority and all outputs are subject to Section 39 of the Statistics and Registration Service Act (2007) (PDF, 225KB).
Business surveys operating within the UK are governed under the Statistics of Trade Act (1947). This states that tables should not be published that would disclose any information relating to an individual business unless there is expressed consent in writing from that business.
Our confidentiality pledge assures confidentiality given to respondents:
“All the information you provide is kept strictly confidential. It is illegal for us to reveal your data or identify your business to unauthorised persons."
Statistical disclosure control methodology is applied to LCREE data. This is to make sure that information attributable to an individual or individual organisation, is not identifiable in any published outputs.
The Statistical Disclosure Control Policy sets out the standards for safeguarding the information provided in confidence to us. “Disclosure control” refers to the methods that reduce the risk that confidential information is published in any official statistics. These methods are applied if ethical, practical, or legal considerations require the data to be protected. Disclosure control involves modifying data so that the risk of identifying individuals is reduced, but at the same time attempts to find a balance between improving confidentiality protection and maintaining an acceptable level of quality in the published data.
How we quality assure and validate the data
The degree of closeness between an estimate and the true value.
The LCREE data are survey-based estimates. Surveys gather information from a sample rather than from the whole population. The sample is designed to allow for this, and to be as accurate as possible given practical limitations such as time and cost constraints, but results from sample surveys are always estimates and not precise figures. This means that they are subject to some uncertainty. This can influence how changes in the estimates should be interpreted. Estimates of the level of uncertainty associated with all figures (coefficients of variation) are presented in the datasets to aid interpretation.
In general, changes in the estimates reported between each year are not usually greater than the level that is explainable by sampling variability. This means movements in the estimates should be treated as indicative only.
As in all surveys, the estimates in the LCREE Survey are subject to various sources of error. The total error in a survey estimate is the difference between the estimate derived from the data collected and the true (unknown) value for the population. The total error consists of two main elements: the sampling error and the non-sampling error. The LCREE Survey was designed to minimise both these errors.
This occurs because estimates are based on a sample rather than a census of the population. The results obtained for any single sample may, by chance, vary from the true values of the population but the variation would be expected to be zero on average over a number of repeats of the survey. Sampling error is minimised by using a stratified random sample.
Sampling error is continually monitored with CV calculated for each output measure. The CV is the standard error of a variable divided by the survey estimate and it is used to compare the relative precision across surveys or variables. The closer the CV is to zero, the more accurate the estimate in percentage terms. A rough guide to CVs is: 5% is very good, 10% is good, 20% is acceptable, over 20% should be used with caution.
Confidence intervals of 95%, the range within which the true population would fall for 95% of the times the survey was repeated, will be provided from the publication of 2018 data onwards following user feedback. This is another standard way of expressing the statistical accuracy of a survey-based estimate. If an estimate has a high error level and CV, the corresponding confidence interval will be very wide.
There is potential for non-sampling error which cannot be easily quantified. These can be caused by coverage issues, measurement and non-response. A number of steps are taken to minimise non-sampling error and are listed in this section.
Returned information is run through a series of validation checks to identify any errors. Data that fail the validation checks are queried with respondents to confirm or correct the original data.
Responses are further quality-assured using a number of resources. For example, key word searches are undertaken on company names. Information from trade membership organisations is also used.
Following despatch of the questionnaire, up to two reminders are sent to businesses that have not responded. Response-chasing exercises are also carried out, targeting large businesses in important industries that are likely to be operating in the LCREE sectors.
The response rate for 2019, 2020 and 2021 data were lower than usual, this is suspected to be because of the coronavirus (COVID-19) pandemic (2019 was affected because the data were collected in 2020). In 2018, the response rate was 81%, compared with 65% in 2021. This means that the estimates in this statistical bulletin may be subject to more uncertainty than usual because of fewer respondents on which to base the survey results.
In addition, LCREE has a rolling programme of questionnaire reviews where stakeholders are consulted on any changes that may be implemented to improve and clarify the survey questions and supporting notes, and hence help respondents complete the survey more accurately.
LCREE calendar year results
LCREE estimates are published for calendar years. However, to reduce the burden on respondents, some businesses use the option to return data for their business year-end. This covers any 12-month period up to and including the end of the financial year that follows the end of the calendar year. It is possible that, particularly if the economy is undergoing a period of rapid change such as during an economic downturn, the different reporting periods could introduce some bias.
Estimates are calculated on regional LCREE activity at the country level. For businesses with multiple sites, using the country recorded on our business register was likely to result in assigning the LCREE activities to the country where the reporting head office was located. A question was therefore tested and added to ask respondents to proportion their LCREE activity between UK countries to enable accurate regional estimates to be produced.
Industry classification in the Inter-Departmental Business Register
Industry re-classification of a business can occur because of a relatively small change to the nature of its operation, and this can have a significant effect on LCREE estimates by industry. In addition, the correction of misclassification of businesses can lead to bias, particularly where there is systematic movement from one industry to another. This is because, where classification updates are identified via survey returns, it is only units in the survey sample that are updated.
Where a survey does not cover the whole business population, such as the LCREE, re-classification can lead to units moving out of the sample but never into it. In the LCREE this effect is likely to be small, and is corrected for by adjusting the weights of the businesses that remain in the sample.
How we review and maintain data processes
Revisions are not unusual, especially in the first few years of a new survey and result from a variety of factors, including:
- the incorporation of additional data received from businesses that have been sampled in multiple years of the survey
- changes to data as a result of businesses revising their previous submissions
- developments in methodology
Revisions are a standard practice when producing official statistics and over time, as more information becomes available, estimates can be revised to improve the quality and accuracy, which will provide a better picture of that being measured.
If revisions arising through improvements to methodology or changes to data are found to be insignificant, they will be introduced in the next planned final estimates bulletin. Revisions to previous estimates are only typically collated for the last two reporting periods.
Assessment of user needs and perceptions
The processes for finding out about uses and users, and their views on the statistical products.
Workshops with a wide variety of users were organised during the start-up phase of the survey to ensure the questionnaire and sample selection met user requirements. Following despatch, monthly highlight reports are provided to the stakeholder group to update on progress. Regular additional workshops with main users are also organised at important points in the survey cycle to update stakeholders further and discuss any developments in detail.Back to table of contents
More information on the Low Carbon and Renewable Energy Economy (LCREE) Survey and other topics related to the UK Environmental Accounts are available:
- UK Environmental Accounts
- Low carbon and renewable energy economy: statistical bulletin
- Low Carbon and Renewable Energy Economy Survey: information for businesses taking part in the survey
- Low carbon and renewable energy economy estimates: dataset
Indirect activity in the LCREE
Indirect and total activity estimates provide an indication of the effect that direct economic activity in the LCREE, as captured by the LCREE Survey, has on the wider economy. This includes additional activity because of demand generated for the products of other firms by the wages paid to employees, or the increase in demand for the inputs used. These estimates are classed as experimental statistics.
The methodology used to produce indirect estimates has been reviewed and updated. The new method utilises the UK input-output analytical tables in its calculations. This data source includes industry-by-industry and further analysis tables derived from the annual Supply and Use Tables (SUTs). The 2019 onwards input-output analytical tables are currently not available. Because of this, direct and indirect LCREE activity will now be separated out into individual publications, with revised indirect estimates being planned for later in 2023.Back to table of contents
Office for National Statistics (ONS), released 16 February 2023, ONS website, Quality and Methodology Information, Low Carbon and Renewable Energy Economy (LCREE) Survey QMI
Contact details for this Methodology
Telephone: +44 1633 560579